<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>07_盒子的内边距</title>
    <style>
        div {
            width: 200px;
            height: 200px;
            background-color: aqua;
            /* padding-left: 10px;
            padding-right: 10px;
            padding-top: 10px;
            padding-bottom: 10px; */
            /* 复合属性 */
            padding: 5px 10px 15px 20px;
        }
    </style>
</head>
<body>
    <div>你好啊</div>
</body>
</html>